Pin roll



y 1937' J. J. KREHBlEL 2,088,378

PIN ROLL File d Jan. 22, 1954 INVEN TOR.

BY ATTORNEY Patented July 27, 1937 UNETED STATES PATENT OFFIE PIN ROLLJohn J. Krehbiel, Bronx, N. Y.

Application January 22, 1934, Serial No. 707,685

11 Claims. (01. 139-304) This invention relates to a new kind of a pinroll. Pin rolls are known to those acquainted with the art of textiles;they form a part of looms or other apparatus used for manufacturing andfinishing textiles. Pin rolls are ordinarily mounted at the delivery endof a loom or of such apparatus, and pull the goods through the loom orthrough the said apparatus at the predetermined speed of operation.

Pin rolls are used on textile machinery and ap paratus to engage attheir periphery upon the goods as they issue from such machinery andthey feed, i. e., pull, the goods through the machinery or apparatus ata predetermined spee The pin rolls commonly used in the art of textilesat the present time comprise a perforated metal tubing filled with aplastic, ypsum or plaster of Paris for instance. Pins are extendedthrough the perforations of the tube into the plastic, the pointed endsof said pins extending predeterminedly above the metal tubing. The metaltubing is provided with a rough surface between the pins so that thegoods are not only engaged by the pins but also by the said roughsurface, in order to avoid an undue local strain upon the goods. A roughsurface is ordinarily provided for upon the surface of the tubing byextending a coarse fiat material, sandpaper for instance, around thecircumference of the tube, the points of the pins extending radiallythrough said material.

This arrangement of the old art entails a number of disadvantages, someof which may be enumerated as follows:

First.--It is difiicult to apply the above described rough material tothe surface of the roll, particularly since it must ordinarily beapplied when the pins are already assembled upon the tubing.

Second.-It is difficult to gather in the free ends of the coarsematerial applied to the tube.

Third.-According to whether the coarse material is tightly or looselyspread over the tube, variations in diameter of the covered tube arise,and affect and upset the uniform, predetermined speed of feed.

Fourth-Extreme care must be used in selecting the coarse material,because the pin roll will feed the goods at different speeds, if thecoarse material varies in thickness and if there is an irregularity inthe protuberance of said material which impart the coarseness thereto.If sandpaper is used as a coarse material, the coarse grain may beshaken out by the vibrations of the machine, or may drop off underchanges of temperatures.

Fifth.Plastic filling of tubes frequently looses its hold upon the pinsinserted therein, for in stance when the plaster of Paris dries. Thepins become loose, shake, come out of alignment, or drop out. When pinsthus drop out they fall onto the goods and damage the goods and themachinery, through which the goods pass afterwards.

The pins frequently have to be replaced for different kinds of goods.Under those circumstances it is often found that the newly inserted pinsare not duly engaged in the holes left by the removed pins. Thereplacement of heavier pins by thinner pins is practically impossible.

Sixth-Since the tube is perforated where the pins are to be extendedtherethrough, the pins have to be arranged accordingly. In other wordsit is not possible to change the pattern in which g the pins arearranged; thin pins engaging upon finer goods cannot be arranged in acloser pat tern than the coarser pins used upon coarse goods.

Seventh.lt is costly to drill the tube accurately and the insertion ofthe pins is also costly, because they have to be inserted by hand.Simple mechanical devices which readily suggest themselves to thoseacquainted with the art of manufacturing and assembling machinery, a jigfor instance by which a whole row of pins is inserted in the roll at atime, cannot be used unless the perforations of the tube have beendrilled with precision, which again would prove to be uneconomical.

' Eighth.It is difficult and tedious to insert the pins to a fixed depthso that they uniformly protrude from the surface of the roll.

These and other disadvantages of the pin rolls of the prior art havebeen overcome by this invention, and further objects of my improvementwill become apparent and will be understood from the followingdescription of my invention and the accompanying drawing, in which Fig.1 shows a perspective view of a sectioned pin roller of my invention.

Fig. 2 shows an enlarged detail section.

Fig. 3 shows a modification of my invention.

Fig. 4, a similar sectioned detail View elaborates on the modificationof Fig. 3.

Similar numerals refer to similar parts throughout the various views:

I provide my pin roll with a core which has a solid surface. In Fig. 1 Iillustrate such a core by a tube 6, made of metal for instance, which issupported concentrically to the shaft 1 by discs,

a flange 8 for instance. A wooden beam or other equivalents may besubstituted for the solidly surfaced core thus described, as clear tothose acquainted with the art of textile machinery.

Around the outer surface 9 of the core extends a covering 50 made out ofan elastic material, rubber for instance. The pins H are spacedlyinserted into said covering l0, substantially centripetally.

Grooves l2 are provided for in the surface l3 of the covering ID inorder to provide a uniform- 1y irregular surface, which affords a bettergrip upon the material to be fed upon the pin roller.

When the goods to be fed are of a delicate nature and are to be fed verycautiously, it is desirable that the outside diameter of the pin roll,at surface 13, be accurately uniform. It will be understood from theshowing of Fig. 3, that even if holes are drilled into outer covering Hiinto which the pins are inserted, that the yieldable material of saidcovering is slightly spread, when the oversize pin M is inserted intosuch a drilled hole. This causes a slight bulging of the surface i3 ofthe covering 40 as indicated by the slightly raised surface I5 of thecovering, as compared with its disposition before the pin is inserted,as indicated by the dotted lines I6. For that reason I show the pins tobe inserted in the bottom of the grooves l2, in Fig. 1, and preferablythey are inserted at points where such grooves cross. Under suchcircumstances the material of covering it will bulge within the grooveif such bulging is caused by the insertion of the pin. But the surfacel3 of the covering ill will not be affected by such bulging and willpreserve its uniform diameter..

Uniformly sized pins II will extend to like distances from the surfaceof the roll, if they are inserted into the covering l0 so as to restupon the surface 9 of the core, (as indicated in Fig. 2). The coveringIll may be softer at its surface than near its inside, so that thesofter surface offers a better grip upon the material, whereas theharder inner part offers a more substantial grip upon the root of thepin. It is known that rubber thus may be treated to be of differenthardness at different points; or the rubber may be app-lied in layers ofdifferent hardness as indicated by layers H and E8 of Fig. 3.

For several purposes I may reverse this arrangement, for instance wherethe grooves l2 are considered to provide a sufficiently irregularsurface to provide an adequate grip upon the goods, but where it isessential that the outer surface l3 retain its true shape in diameterand circumference to the greatest extent possible, then the surface I3is made of greater hardness, whereas the inside of the covering I0 issofter in order to afford an elastic but firm grip for a pin I4 insertedin said covering. In such an instance I provide a harder outer layer I8and a softer inner layer ll of the covering ID, in the manner of theshowing of Fig. 4.

But Fig. 4 goes further and shows a plurality of hard and soft layers.The hard layers l8 serve to retain the pins H in radial alignmentwhereas the soft layers I! arranged between the hard layers serve togrip the pins l l by reason of their elastic properties.

What I claim is:

1. A pin roll comprising rubber and pins supported solely by saidrubber, and protruding from said roll.

2. A pin roll comprising a rubber covering, and extractable pinssupported solely by and protruding from said covering.

. 3. A take up roll for textile machines comprising a rubber covering,and pins engaged in said covering only and protruding therefrom.

4. A pin roll comprising a grooved rubber covering, and pins protrudingfrom the bottom of the grooves in said covering.

5. A take up roll for textile machines comprising a core, a rubbercoveringon said core, and pins resting on the surface of said core andextending through said covering.

6. A pin roll comprising an inner rubber layer, a softer outer rubberlayer, and pins centripetally inserted in and engaged by said outerlayer and extending from said roll.

'7. In a take up roll for textile machines, a core, an elastic covering,and pins completely disposed outside of said core and engaged by saidcovering.

8. The method of making a pin roll, comprising extending an elasticcovering over a core, and then inserting pins in said covering up tosaid core.

9. The method of making a pin. roll in which pins extend from elasticmaterial forming part of said roll, comprising substantiallycentripetally inserting said pins into said material.

10. A pin roll, comprising a core, an elastic covering on said core, andpins mounted in said covering but spaced from said core.

11. In a pin roll, an elastic covering, and pins protruding from oneside of said covering and inserted to a limited depth in said coveringfrom said side.

JOHN J. KREHBIEL.

